Rocky Mountain wildlife: Brown-headed cowbird (Molothrus ater) sits on bison (Bison bison), Wyoming, USA.

These birds are looking for insects that the bison may stir up

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Brown-headed cowbird (Molothrus ater) sits on Bison (Bison bison), Wyoming, USABrown-headed cowbird (Molothrus ater) sits on Bison (Bison bison), Wyoming, USA

Road ecology blog: Boardwalk across coastal dunes to reduce erosion, east of Seagrove Beach. Florida, USA.

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Boardwalk across coastal dunes to reduce erosion, east of Seagrove Beach. Florida, USABoardwalk across coastal dunes to reduce erosion, east of Seagrove Beach. Florida, USA Boardwalk across coastal dunes to reduce erosion, east of Seagrove Beach. Florida, USABoardwalk across coastal dunes to reduce erosion, east of Seagrove Beach. Florida, USA Sign at boardwalk across coastal dunes to reduce erosion, east of Seagrove Beach. Florida, USASign at boardwalk across coastal dunes to reduce erosion, east of Seagrove Beach. Florida, USA

Rocky Mountain wildlife: Black bear (Ursus americanus), Wyoming, USA.

Black bears are not always black. Their color can range from black to cinnamon (light brown) to almost white. Here is a sow with a cinnamon and a black colored cub.

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Black bear (Ursus americanus), Wyoming, USABlack bear (Ursus americanus), Wyoming, USA Black bear (Ursus americanus), Wyoming, USABlack bear (Ursus americanus), Wyoming, USA Black bear (Ursus americanus), Wyoming, USABlack bear (Ursus americanus), Wyoming, USA Black bear (Ursus americanus), Wyoming, USABlack bear (Ursus americanus), Wyoming, USA

Rocky Mountain wildlife: Bison (Bison bison) calves, Wyoming, USA

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Bison (Bison bison) calves, Wyoming, USABison (Bison bison) calves, Wyoming, USA

Road ecology blog: Wildlife fence (smaller mesh size towards bottom), Hwy 331, Hwy 83 near Freeport, Florida, USA

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Wildlife fence (smaller mesh size towards bottom), Hwy 331, Hwy 83 near Freeport, Florida, USAWildlife fence (smaller mesh size towards bottom), Hwy 331, Hwy 83 near Freeport, Florida, USA

Rocky Mountain wildlife: Bison (Bison bison) nursing calf, Wyoming, USA

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Bison (Bison bison) nursing calf, Wyoming, USABison (Bison bison) nursing calf, Wyoming, USA Bison (Bison bison) nursing calf, Wyoming, USABison (Bison bison) nursing calf, Wyoming, USA Bison (Bison bison) nursing calf, Wyoming, USABison (Bison bison) nursing calf, Wyoming, USA

Road ecology blog: Construction for highway widening (4 lanes to 2 lanes), Hwy 331, Hwy 83 near Freeport, Florida, USA.

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Construction for highway widening (4 lanes to 2 lanes), Hwy 331, Hwy 83 near Freeport, Florida, USAConstruction for highway widening (4 lanes to 2 lanes), Hwy 331, Hwy 83 near Freeport, Florida, USA Construction for highway widening (4 lanes to 2 lanes), Hwy 331, Hwy 83 near Freeport, Florida, USAConstruction for highway widening (4 lanes to 2 lanes), Hwy 331, Hwy 83 near Freeport, Florida, USA Construction for highway widening (4 lanes to 2 lanes), Hwy 331, Hwy 83 near Freeport, Florida, USAConstruction for highway widening (4 lanes to 2 lanes), Hwy 331, Hwy 83 near Freeport, Florida, USA Construction for highway widening (4 lanes to 2 lanes), Hwy 331, Hwy 83 near Freeport, Florida, USAConstruction for highway widening (4 lanes to 2 lanes), Hwy 331, Hwy 83 near Freeport, Florida, USA

Rocky Mountain wildlife: Bison (Bison bison), Wyoming, USA.

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Bison (Bison bison), Wyoming, USABison (Bison bison), Wyoming, USA

Road ecology blog: Double yellow stripes in center of highway on pavement, Hwy 331, Hwy 83 near Freeport, Florida, USA

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Double yellow stripes in center of highway on pavement, Hwy 331, Hwy 83 near Freeport, Florida, USADouble yellow stripes in center of highway on pavement, Hwy 331, Hwy 83 near Freeport, Florida, USA

Rocky Mountain birds: Mountain bluebird (Sialia currucoides), Wyoming, USA.

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Mountain bluebird (Sialia currucoides), Wyoming, USAMountain bluebird (Sialia currucoides), Wyoming, USA

Road ecology blog: Bison (Bison bison) on road, Wyoming, USA.

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Rocky Mountain wildlife: Bison (Bison bison) herd, Wyoming, USA.

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Bison (Bison bison) herd, Wyoming, USABison (Bison bison) herd, Wyoming, USA

Road ecology blog: Moose (Alces alces) on road, Montana, USA.

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Moose (Alces alces) on road, Montana, USAMoose (Alces alces) on road, Montana, USA